Steel Carriage Bolt, Grade 2, Zinc Plated Finish, Square Neck, Round Head, Meets ASME B18.5/ASTM A307, 3-3/4" Length, Fully Threaded, 3/8"-16 UNC Threads (Pack of 25)

★★★★★ 5.0 31 reviews

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Management number 218173590 Release Date 2026/05/03 List Price $8.16 Model Number 218173590
Category

The grade 2 steel carriage bolt with zinc plated finish has a square neck and a round head and meets American Society of Mechanical Engineers ASME B18.5 and ASTM A307 specifications. Grade 2 steel, composed of either low or medium carbon steel, is often used in applications where toughness is the primary consideration. The zinc plating offers corrosion resistance and has a reflective appearance. The square neck prevents the bolt from turning once installed, even when a nut is tightened. The round head has a domed shape.Carriage bolts, also called round head square neck bolts, are square-necked threaded fasteners commonly used in wood fastening applications. The bolt’s square neck prevents it from turning once installed using a nut.

  • Grade 2 steel is often used in applications where toughness is the primary consideration
  • Zinc plating resists corrosion and has a reflective appearance
  • Square neck prevents the bolt from turning once installed, even when a nut is tightened
  • Round head has a domed shape
  • Meets ASME B18.5 and ASTM A307 specifications
UPC 082893648842
Brand Small Parts
Color zinc
Model 489081
Size Name 3/8"-16
Unit Count 25.0 Count
Part Number B009YB11A4
Thread Size 3/8"-16
Thread Type Unc
Drive System Square
Grade Rating Grade 2
Manufacturer Brighton Best
Thread Class 2A
Thread Style Right Hand
Fastener Size #10-12
Fastener Type Carriage Bolt
Item Hardness Grade 2
Material Type Alloy Steel
Exterior Finish Zinc
Item Dimensions 3.75 inches
Number Of Items 25
Thread Coverage Fully Threaded
Screw Head Style Round
Manufacturer Grade Grade 2

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